Manual Title: Supplement Issue: 8 Part Number: 1625019 Issue Date: 9/17 Print Date: October 2011 Page Count: 12 Revision/Date: 11 This supplement contains information necessary to ensure the accuracy of the above manual. 2014-2017 Fluke Corporation. All rights reserved. Printed in U.K.
Change #1, 135 On page 8-3, add the following section to the bottom of the page: 8.2.4 Active Heads A range of Active Heads are available for the 9500B Oscilloscope calibrator. Active head connector wear can seriously impact product specifications. Fluke recommends that connectors are inspected for wear or damage before use. The recommended interval for connector replacement based on average use is every two years, and once per year for Active heads with higher than average use. Contact a Fluke authorized service center for replacement. Attempts to change connectors without the correct tools, training or calibration system is not recommended. On page 10.6-1, under 9510/9530/9550/9560 Head Calibration Procedures replace the second paragraph with the following: The list of topics above are placed in the order in which the 9500B Head functions should be calibrated. Head calibration requires the use of a verified 9500B Mainframe. On page 10.6-6, under 10.6.2.8 Calibration Procedure, add the following note: Note The 9560 can only operate with the 9500B mainframe. It also requires the 9500B/3200 frequency configuration. The 9500 oscilloscope calibrator is not compatible with the 9560. Neither are mainframes configured with frequency bandwidth less than 3200 MHz On page 10.6-7, under 10.6.3.1 Summary, replace the paragraph with the following: The Edge Function is calibrated by applying risetime corrections in the sequences given in paras 10.6.3.4 through 10.6.3.12. Equipment requirements are given in para 10.6.3.2; para 10.6.3.3 describes the Calibration Setup. Under 10.6.3.2 Equipment Requirements, replace the entire section with the following: The UUT Active Head, connected to a verified Model 9500B Mainframe. High-bandwidth sampling oscilloscope with bandwidth 6GHz for Risetime measurements.( 20GHz for 9550 and 9560) Example: Tektronix Model TDS820 with an 80E01 series plug or Agilent 86100 Digitizing Oscilloscope with a HP83489A or 54752A 50GHz Sample Head. 50 SMA SMA co-axial Trigger cable for trigger inputs to the high-bandwidth oscilloscope Note Calibrating the 25 ps edge risetime of the 9550 requires the use of a short (no longer than 19.5 inches or 0.5 m), high quality, trigger cable fitted with SMA connectors. This insures a trigger signal with timing that is compatible with certain models of high speed sampling oscilloscopes. Example: Fluke part number 2636395 (supplied with 9550 or available as a spare part) High-bandwidth coaxial attenuator may be required if 9500B edge output voltage exceeds oscilloscope input capability. Example: HP8493C opt 20 26.5GHz 3.5mm 20 db attenuator. 9/17 1
On page 10.6-12, under 10.6.3.12 Calibration Procedure: 25ps Edge: Speed replace the entire section with the following and add figure 10.6.3.2 and delete Table 10.6.3.9: 1. Ensure that the 9500B is connected to the oscilloscope as shown in figure 10.6.3.2 and that both instruments are powered on and warmed up. (Be sure to use the appropriate connector adapter as necessary to connect the 9550 s SMA output connector to the input connector of the oscilloscope.) Basic Setup 1.1 Recommended Settings for the Sampling Oscilloscope: Channel Setup Scale 100mV/div External Scale 0dB Units Volts Bandwidth >20GHz Offset -220 mv Trigger Source Channel 2 Slope Positive Edge Timebase Scale 50pS/div Reference Center Windowing Disabled Position 25 ns Acquisition Averaging Off Fast Edge Rise time & Fall time Measurement Procedure 2.1 Press the MODE function key to access the main menu screen. 2.2 From the main menu screen selection, select the MANUAL Mode of operation 2.3 Using the major function keys, select the Edge function 2.4 From the screen menu, select FAST edge, followed by the 25ps pulse function On the earlier 9500 models the 25 ps function is accessible through AUX key on the front panel. Note 2.5 To insure the 9500B is properly configured for calibration, the TRIGGER CHANNEL and CABLE SELECT must match and be different from the SIGNAL CHANNEL settings. Use the following key sequence. Press the CHANNEL SELECT selection, Select the proper SIGNAL CH setting as connected to the 9550 Head being calibrated (select among CH1 to CH5 alternatives), Press the TRIGGER CHANNEL selection, Select the proper TRIGGER CH setting as connected with the external trigger cable (select among CH1 to CH5 alternatives), Confirm the wording Trigger Cable is displayed on the same channel as connected with external trigger cable. If not, then push the CABLE SELECT soft key and then match the CABLE CH setting to the correct trigger channel, and push EXIT, Press the TRIGGER RATIO selection, and Select the desired signal to trigger ratio (typically divide by 10). 2.6 Return to the 25 ps FAST Edge screen by pressing EXIT twice 2.7 Prepare to measure the 9550 s rising edge transition time. On the 9500B confirm operation with the settings at an Amplitude of 500mV, Frequency at 1MHz, Rising Edge, and OUTPUT ON. 2.8 Adjust Oscilloscope Channel Offset and Timebase Position to center the displayed waveform. 2.9 Set the oscilloscope to average 256 samples. 2.10 Select on the oscilloscope the appropriate edge transition (rising or falling) corresponding to what is being measured. 2 9/17
2.11 Record the measured edge speed as observed on the oscilloscope. 2.12 The measured edge rise time value is the average of 8 separate measurements. Use the following sequence for measuring the remaining measurement values Press the calibrator OUTPUT OFF button, Press the calibrator OUTPUT ON button, Repeat the measurement and record the measured rise time. Repeat this sequence in step 2.12 until you have recorded a total of 8 measurements. 2.13 Calculate the average of these 8 measurements to a precision of 2 decimal places. This is the calculated average rise time of the combined 9550 signal rise time and the oscilloscope response rise time. 2.14 Using the following formula, determine the 9550 s calibrated edge rise time by subtracting the measured (or calibrated) oscilloscope measurement response rise time from your calculated average. Edge Rise Time = 2 2 ( Calculated Average Rise Time) ( Scope Rise Time) 9/17 3 2.15 Save this calculated edge rise time value for later use in calibrating the head. 2.16 Prepare to measure the 9550 s falling edge transition time by selecting the falling edge with the soft key. On the 9500B confirm operation with the settings at an Amplitude of 500mV, Frequency at 1MHz, Falling Edge, and OUTPUT ON. 2.17 Repeat steps 2.8 to 2.15 for the 9550 s falling edge time measurement. 2.18 Turn the OUTPUT OFF Save Calibration Data to Active Head 3.1 Insure the rear-panel Calibration Enable switch is in the ENABLE position. 3.2 Press the MODE function key to access the main menu screen. 3.3 Press the CALB Key on the main menu. 3.4 Enable changing calibration constants by entering a valid password to access the Calibration Mode display screen. 3.5 From the main menu screen selection, select the HEAD CAL Mode of operation. 3.6 Confirm the CHANNEL SELECT settings are appropriate, then select EDGE and 25pS. 3.7 Select TARGET 1 3.8 Refer to the Rising Edge speed as calculated in the previous section and enter this value into the edge speed field on the display screen. Press ACCEPT CAL. 3.9 Select TARGET 2 and similarly enter calculated Falling Edge speed value. Press ACCEPT CAL followed by EXIT. 3.10 Select STORE HEAD CAL and follow on screen instructions to: Select the warning period before recalibration is due (leave at default 30 days unless otherwise requested). Modify the calibration due date (default 1 year from calibration date) 3.11 Select STORE. Use the CHANNEL SELECT softkey to change to the appropriate Active Head to save any unsaved data until the NONE indicator is displayed. 3.12 Select EXIT to step back through the menus to the main Calibration Mode menu, then press the MODE key to exit calibration mode. 3.13 Disconnect 9550 from 9500B Base Unit.
Add the following Figure 10.6.3.2 Change #2, 49207 On page 7-5, under Table 7.6.1 change the following: From: Frequency Uncertainty 12kHz ±0.25ppm, <12kHz ±3ppm To: Frequency Uncertainty >15kHz ±0.25ppm ±12mHz, 15kHz ±3ppm 4 9/17
On page 9-22, under Table 9.9.1.1, replace the entire Table with the following: Table 9.9.1.1. Sine Verification into 50Ω Load Please copy the following table. Enter the measurements in the Measured Value column on the copy and calculate as shown: Verif. Point Freq. Output Voltage (pk-pk) Tolerance Tolerance Output Limits (pk-pk) Limits (RMS) Voltage Lower Higher (RMS) Lower Higher Measured Value (RMS) Calculated Value SGN1 1kHz 1.0000V -0.020V 0.020V 0.35355V -7.07mV 7.07mV SGN8- SGN1 SGN2 1kHz 300.00mV -6.0mV 6.0mV 106.066mV -2.12mV 2.12mV SGN9- SGN2 SGN3 1kHz 100.00mV -2.0mV 2.0mV 35.3553mV -0.71mV 0.71mV SGN10- SGN3 SGN4 45kHz 1.0000V -0.020V 0.020V 0.35355V -7.07mV 7.07mV SGN8- SGN4 SGN5 45kHz 300.00mV -6.0mV 6.0mV 106.066mV -2.12mV 2.12mV SGN9- SGN5 SGN6 45kHz 100.00mV -2.0mV 2.0mV 35.3553mV -0.71mV 0.71mV SGN10- SGN6 SGN7 50kHz 3.0000V 2.955V 3.045V 1.06066V 1.04475V 1.07657V NA SGN8 50kHz 1.0000V 0.985V 1.015V 0.35355V 0.34825V 0.35885V NA SGN9 50kHz 300.00mV 295.50mV 304.50mV 106.066mV 104.475mV 107.657mV NA SGN10 50kHz 100.00mV 98.50mV 101.50mV 35.3553mV 34.8250mV 35.8856mV NA SGN11 50kHz 30.000mV 29.55mV 30.45mV 10.6066mV 10.4475mV 10.7657mV NA Change #3 Replace all pages 10.6-6, with the following: 10.6.2.8 Calibration Procedure: 6GHz Levelled Sine Function: HF Linearity up to 3.2GHz (9560 only) 1. 9500B: Ensure that the 9500B is in HEAD CAL, Sine, 3GHz Sine mode, LIN. 2. The following process takes you through all TARGETs in table 10.6.2.5. 3. 9500B: Set Output ON. 4. Power Meter: Select a range that gives an on-scale reading. 5. Adjust the 9500B's output amplitude to give a reading equal to Target Amplitude on the measuring device. The conversion from power to pk-pk voltage is pk-pk Voltage = (power)*20. 6. Press ACCEPT CALIB. 7. Select the next TARGET and return to step 4; repeat until no TARGETs remain. Table 10.6.2.5: 3GHz Levelled Sine Function: Cal. Point Voltage Frequency Target 1 450.00mV 1.2GHz Target 2 700.00mV 1.2GHz Target 3 1.0000V 1.2GHz Target 4 1.6000V 1.2GHz Target 5 2.4000V 1.2GHz Target 6 3.5000V 1.2GHz 9/17 5
10.6.2.9 Calibration Procedure: 6GHz Levelled Sine Function: HF Flatness up to 3.2GHz (9560 only) 1. 9500B: Ensure that the 9500B is in HEAD CAL, Sine, 3GHz Sine mode, FLAT. 2. The following process takes you through all TARGETs in table 10.6.2.6. The process sequentially calibrates all amplitudes at one frequency before repeating the same amplitude calibration points at the next frequency step. 3. 9500B: Set Output ON. 4. Power Meter: Select a range that gives an on-scale reading. 5. Adjust the 9500B's output amplitude to give a reading equal to Target Amplitude on the measuring device. The conversion from power to pk-pk voltage is pk-pk Voltage = (power)*20. 6. Press ACCEPT CALIB. 7. Select the next TARGET and return to step 4; repeat until no TARGETs remain. 8. Press NEXT FREQ then select TARGET 1 and return to step 4; repeat until no TARGETs remain. Table 10.6.2.6: 3GHz Levelled Sine Function: HF Flatness Cal. Point Voltage Frequency Target 1 1.6000V 1.2GHz Target 2 526.30mV 1.2GHz Target 3 155.30mV 1.2GHz Target 4 51.300mV 1.2GHz Target 5 15.240mV 1.2GHz Repeat the process using the Cal. Point voltage levels in the Targets 1-5 sequence for each of these frequency points, for a total of 75 calibration steps: Targets 06-10: 1.50GHz Targets 11-15: 1.75GHz Targets 16-20: 1.95GHz Targets 21-25: 2.05GHz Targets 26-30: 2.20GHz Targets 31-35: 2.30GHz Targets 36-40: 2.45GHz Targets 41-45: 2.55GHz Targets 46-50: 2.65GHz Targets 51-55: 2.80GHz Targets 56-60: 2.90GHz Targets 61-65: 3.00GHz Targets 66-70: 3.10GHz Targets 71-75: 3.20GHz 10.6.2.10 Calibration Procedure: 6GHz Levelled Sine Function: HF Linearity above 3.2GHz (9560 only) 1. 9500B: Ensure that the 9500B is in HEAD CAL, Sine, 6.4GHz Sine mode, LIN. 2. The following process takes you through all TARGETs in table 10.6.2.7. 3. 9500B: Set Output ON. 4. Power Meter: Select a range that gives an on-scale reading. 5. Adjust the 9500B's output amplitude to give a reading equal to Target Amplitude on the measuring device. The conversion from power to pk-pk voltage is pk-pk Voltage = (power)*20. 6. Press ACCEPT CALIB. 7. Select the next TARGET and return to step 4; repeat until no TARGETs remain. Table 10.6.2.7: 6GHz Levelled Sine Function: HF Linearity 6 9/17
Cal. Point Voltage Frequency Target 1 400.00mV 3.3GHz 10.6.2.11 Calibration Procedure: 6GHz Levelled Sine Target 2 700.00mV 3.3GHz Function: HF Flatness above Target 3 1.0000V 3.3GHz 3.2GHz (9560 only) Target 4 1.6000V 3.3GHz 1. 9500B: Ensure that Target 5 Target 6 2.0000V 2.5000V 3.3GHz 3.3GHz the 9500B is in HEAD CAL, Sine, 6.4GHz Sine mode, FLAT. 2. The following process takes you through all TARGETs in table 10.6.2.8. The process sequentially calibrates all amplitudes at one frequency before repeating the same amplitude calibration points at the next frequency step. 3. 9500B: Set Output ON. 4. Power Meter: Select a range that gives an on-scale reading. 5. Adjust the 9500B's output amplitude to give a reading equal to Target Amplitude on the measuring device. The conversion from power to pk-pk voltage is pk-pk Voltage = (power)*20. 6. Press ACCEPT CALIB. 7. Select the next TARGET and return to step 4; repeat until no TARGETs remain. 8. Press NEXT FREQ then select TARGET 1 and return to step 4;repeat until no TARGETs remain. Table 10.6.2.8: 6GHz Levelled Sine Function: HF Flatness Cal. Point Voltage Freq. Target 1 1.6000V 3.3GHz Target 2 500.00mV 3.3GHz Target 3 152.00mV 3.3GHz Target 4 48.500mV 3.3GHz Repeat the process using the Cal. Point voltage levels in the Targets 1-4 sequence for each of these frequency points, for a total of 60 calibration steps: Targets 05-08: 3.50GHz Targets 09-12: 3.70GHz Targets 13-16: 3.90GHz Targets 17-20: 4.10GHz Targets 21-24: 4.30GHz Targets 25-28: 4.50GHz Targets 29-32: 4.70GHz Targets 33-36: 5.00GHz Targets 37-40: 5.30GHz Targets 41-44: 5.50GHz Targets 45-48: 5.80GHz Targets 49-52: 6.00GHz Targets 53-56: 6.20GHz Targets 57-60: 6.40GHz 9/17 7
Change #4, 66671 On page 0-8, under the Warning add: Warning To prevent possible electrical shock, fire, or personal injury: Read all safety information before you use the Product. Carefully read all instructions. Use the Product only as specified, or the protection supplied by the Product can be compromised. Use extreme caution when the Product is in use. The Product can supply a lethal electric shock. Do not use the Product if it operates incorrectly. Examine the Product before use. Do not use the Product if it shows signs of damage. Carefully examine the insulation around the connectors. Do not use the Product around explosive gas, vapor, or in damp or wet environments. Do not use and disable the Product if it is damaged. Do not touch voltages >30 V ac rms, 42 V ac peak, or 60 V dc. Use this Product indoors only. Use only the mains power cord and connector approved for the voltage and plug configuration in your country and rated for the Product. Do not apply hazardous voltages to any connector other than the mains supply to the mains input. Make sure the ground conductor in the mains power cord is connected to a protective earth ground. Disruption of the protective earth could put voltage on the chassis that could cause death. Replace the mains power cord if the insulation is damaged or if the insulation shows signs of wear. If the mains power cord is to be the accessible disconnect device, the mains power cord must not be longer than 3 meters (118.1 inches). Do not remove the cover until the test leads are removed. Turn the Product off and remove the mains power cord. Stop for two minutes to let the power assemblies discharge before you open the fuse door. Do not operate the Product with covers removed or the case open. Hazardous voltage exposure is possible. Disconnect the mains power cord before you remove the Product covers. Remove the input signals before you clean the Product. Use only specified replacement parts. Use only specified replacement fuses. The mains power service must be a protected branch circuit, and if the mains power cord is internally fused, a 10 A fuse must be fitted in the mains power cord plug. Have an approved technician repair the Product. Do not use test leads if they are damaged. Remove signal connections before the protective ground connection is removed. For example, the mains power cord must be connected when the signal leads are connected. Do not connect or disconnect signal leads while they are connected to a hazardous voltage or current source. 8 9/17
Limit operation to the specified measurement category, voltage, or amperage ratings. Complete safety tests after a part replacement to make sure the Product is safe. To prevent the public transmission of an unintentional RF signal, never connect the Product output to an antenna outside a shielded room. Add Symbols Table: Table 1. Symbols Symbol Description Risk of danger. Important information. See manual. Hazardous voltage. Voltage >30 V dc or ac peak might be present. AC (Alternating Current). Power ON / OFF Functional Earth ground. This product complies with the WEEE Directive (2002/96/EC) marking requirements. The affixed label indicates that you must not discard this electrical/electronic product in domestic household waste. Product Category: With reference to the equipment types in the WEEE Directive Annex I, this product is classed as category 9 "Monitoring and Control Instrumentation product. Do not dispose of this product as unsorted municipal waste. Go to Fluke s website for recycling information. Recycle. Product conforms with the requirements of the applicable EC directives. Intertek ETL listed mark for CSA C22.2 61010-1, and UL 61010-1. On page 2-3, replace the 9500B Rear Panel figure with: 9/17 9
9500B Rear Panel On page 2-6, under 2.7.2 Power Input, replace the Table with: Line Voltage Selection Line Voltage FUSE 5 x 20 mm 100 V 100 V -- 115 V T10.0AH 250 V 120 V 115 V -- 120 V T10.0AH 250 V 220 V 220 V T5.0AH 250 V 240 V 230 V -- 240 V T5.0AH 250 V Under 2.7.4 Power Fuse replace the fuse rating with: T5.0AH 250 V for 220/240 V line voltage selection. T10.0AH 250 V for 100/120 V line voltage selection. Under 2.7.5 Line Voltage, replace the first paragraph with: The 9500B is operative for nominal line voltage selections: 100/120/220/240 V, 50 to 60Hz. Change #5, 428, 429 On page 1-4, under 1.3, replace number 2 with: 2. The following accessories are shipped with the instrument: Pt. No. Description 3127944 Current Loop Assembly for use in Current Function 2117399 Trigger Cable for trigger purposes only, in place of an Active Head TM 10 9/17
On page 7-1, under 7.1.1 Environmental, replace the Table with: Environmental Operating Storage Temperature 5 C to 40 C 0 C to 50 C Transit <100 hrs -20 C to 60 C Humidity (non-condensing) <90 % 5 C to 30 C <75 % 30 C TO 40 C <95 % 0 C TO 50 C Altitude <2000 m, 6500 ft <12000 m, 40000 ft Safety IEC 61010-1: Overvoltage Category II, Pollution Degree 2 Shock and Vibration Electromagnetic Compatibility (EMC) Line Frequency MIL-T-28800 type III class 5, style E IEC 61326-1: (Controlled EM Environment); CISPR 11, Group 1, Class A Group 1 equipment: Group 1 has intentionally generated and/or use conductively coupled radio-frequency energy which is necessary for the internal functioning of the equipment itself. Class A equipment is equipment suitable for use in all establishments other than domestic and those directly connected to a low voltage power supply network which supplies buildings used for domestic purposes. Caution - There may be potential difficulties in ensuring electromagnetic compatibility in other environments, due to conducted and radiated disturbances. Emissions which exceed the levels required by CISPR 11 can occur when the equipment is connected to a test object. USA (FCC) -- 47 CFR 15 subpart B, this product is considered an exempt device per clause 15.103 Korea (KCC) Class A Equipment (Industrial Broadcasting & Communication Equipment) This product meets requirements for industrial (Class A) electromagnetic wave equipment and the seller or user should take notice of it. This equipment is intended for use in business environments and not to be used in homes. 50 Hz to 60 Hz 100 V -- 115 V rms Line Voltage Power Consumption Line Fuse: Warm-up 115 V -- 120 V rms 220 V rms 230 V -- 240 V rms <250 VA 220/240 T5.0AH 250 V 100/120 V T10.0AH 250 V 20 Minutes Change #7, 455 On page 1-3, replace 1.2.2.2 Procedure Mode, with: 1.2.2.2 Procedure Mode 'Procedure' Mode involves the use of a memorized calibration procedure. The manufacturer's data for the UUT oscilloscope will have been interpreted into a series of calibration operations, which are programmed on to a memory card. When the card is inserted into an available PCMCIA slot in the front panel, the 9500B will move from operation to operation, switching the 9500B controls automatically, and issuing a series of requests for the operator to change UUT switching and connections. Refer to Section 5. Portocal II v 1.7 (see paras 1.3) can be used to generate calibration sequences on procedure cards to calibrate UUT oscilloscopes using the Model 9500B. 9/17 11
On page 1-4, under 1.2.2.5 Test Mode, replace the Interfact-Test, with: 'Interface' Test: This can be used to check the operation of the display and its memory, the keyboard and/or printer connected to the instrument. On models that have two PCMCIA slots, a blank memory card can be tested in either slot. (WARNING!: the stored contents of any memory card subjected to this test will be overwritten!) On page 3-2, under 3.2.1.4 General Arrangement of Front Panel Controls, replace Right, with: Right: A control panel, used to select and adjust operational Functions and Modes, with two slots to accept memory cards. Some models are equipped with only one slot that can be used to run procedures or firmware updates. On page 3-3, replace 3.2.2.4 PCMCIA SLOT 1 and PCMCIA SLOT 2, with: 3.2.2.4 PCMCIA SLOT 1 and PCMCIA SLOT 2 These slots are included mainly for Procedure mode (Section 5), although there are secondary uses. Some models are equipped with only one slot that can be used to run procedures or firmware updates. On page 3-8, under 3.4.1.1 Mode Overview, replace PROC = Procedure Mode with: PROC = Procedure Mode: For calibration of a specific type of UUT, the sequence of 9500B output selections is determined by a 'Procedure' memory card, placed in the left-hand PCMCIA SLOT 1 beneath the panel outline. Results can be printed, or recorded in a second 'Data' card, placed in the right-hand PCMCIA SLOT 2, if equipped. Refer to Section 5. On page 3-15, under the 3.4.3.17 'Results card' add the following note: Note This section is only applicable for products that are equipped with a PCMCIA SLOT 2. On page 5.2-3, replace 5.2.5 Saving Results on Memory Cards, 5.2.5.4 Static RAM Card Non- Rechargeable Battery Condition and 5.2.5.5 Static RAM Card Rechargeable Battery, sections with: 5.2.5 Saving Results on Memory Cards Front Panel PCMCIA Slots In Procedure mode, the procedures for adjustment and verification operations for UUTs are controlled from a pre-programmed memory card, inserted in the left PCMCIA SLOT 1 on the 9500B front panel. The results of these operations can be saved on Static RAM memory cards, inserted in the right PCMCIA SLOT 2, if equipped. The 9500B 'Test' mode of operation can be used to erase SRAM cards containing old results, and initialize them as blank results cards (refer to Section 8, paras 8.3.4.5). Although 'FLASH' cards are used to store procedures, they cannot be used for storing results. 5.2.5.4 Static RAM Card Non-Rechargeable Battery Condition Battery Voltage Monitoring Each Static RAM card is powered by its own battery which maintains the non-volatile status of its RAM. While a results card is present in PCMCIA SLOT 2, if equipped the 9500B continuously monitors the battery voltage state. When the voltage falls to approach a failure condition, a warning is given on the 9500B screen. Changing the Battery With the card present in PCMCIA SLOT 2, if equipped the RAM is powered from 9500B power supplies, so it is possible to pull out the battery module from the card and insert a new module without losing the stored data. 5.2.5.5 Static RAM Card Rechargeable Battery Battery Charging Each Static RAM card is powered by its own battery which maintains the non-volatile status of its RAM. While a results card is present in PCMCIA SLOT 2, if equipped with the 9500B powered ON, the battery will be recharged. The specified recharge times are 8 hours to 60 % capacity, and 40 Hours to 100% capacity. If the card battery charge is low when the card is inserted into PCMCIA SLOT 2, if equipped a low battery warning may be given on the 9500B screen, during the initial charge period of up to 40 seconds. 9/17 12