Do not install or remove modules in a DAS mainframe while the mainframe power is on. Doing 50 may damage the module or the mainframe.
1 . Turn off power to the DAS mainframe.
2. Pull the 91 A04A out of the two plugs on the bottom of the mainframe. You do not need to dis-connect any cables.
3. Without disconnecting any cables, raise the 91 A04A module about 5 cm (2 inches) out of the mainframe. J245 should be above the top of the mainframe.
4. Remove the black plastic rectangular jumper from the pins of J245. If the 91 A04A is to be used with expander modules, install the jumper on pins 1 and 2 of J245. If the 91 A04A is to be used without expander modules, install the jumper on pins 2 and 3 of J245.
5. After the jumper is firmly installed on the correct pins of J245, press the 91 A04A module back into the mainframe. The module is in place when it is flush with the tops of the other installed modules.
The 91 A04A module is now ready to be used.
91 AE04A ADJUSTMENT PROCEDURE
91AE04A Data Acquisition Module adjustment consists of making one voltage measurement and moving one jumper. The placement of this jumper depends on the difference between the +5 V lev-els of the 91 AE04A and the master module.
The 91AE04A adjustment should be performed under the following conditions:
• Installation - The 91 AE04A adjustment should be performed when the 91 AE04A module is first installed in a mainframe. If the 91 AE04A module was installed at the factory, the adjustment has already been performed. If the 91 AE04A module was ordered separately from the mainframe, perform the adjustments after you have installed the 91 AE04A modules and connected their cables to the master 91 A04A or 91 A04.
• Slot Position Changes - The validity of the 91 AE04A adjustment depends on the DAS slots used during the adjustment. The 91 AE04A adjustment only needs to be performed once so long as all 91 AE04A modules remain in the slots they are adjusted to. The master 91 A04A or 91 A04 module must also stay in the slot used during the adjustment. You must perform the ad-justments again if you move any of these modules to different slots.
• Power Supply Changes - If any of the +5 V Power Supplies for the 91AE04A modules are changed or replaced, the adjustment must be performed. Also, if the +5 V supply for the master 91 A04A or 91 A04 module is changed or replaced, the adjustment must be performed on all 91 AE04A modules.
The adjustment requires the equipment shown in Table 3~5. The location of the jumper used in the adjustment is shown in Figure 3-11.
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Table 3-5
EQUIPMENT REQUIRED FOR 91AE04A ADJUSTMENT
EQUIPMENT SPECIFICATIONS
91 A04A or 91 A04 Data Ac- Master module for the quisition Module 91 AE04A during the
adjust-ment and for subsequent use
Digital Multimeter (DMM) Test leads for the digital multimeter
Square pin jumper
3.S digits, 0.1 % resolution with floating inputs
Equipped with retractable hook tips
0.1 inch centers
W148 PIN 6
FRONT VIEW
EQUIVALENT TETRONIX EQUIPMENT
Tektronix DMS02A Digital Multi-meter with a TM SOO mainframe positive lead, 012-042600; neg-ative lead, 012-2S-00; retract-able hook tips, order two of 013-0107-00
131-0993-00
4676-11
Figure 3-11. Location of jumper W148 and Ie U155 pin 16 on 91AE04A modules. If the measured voltage is between - 75 mV and + 25 mV, place the jumper on W148. If the measured voltage is between +25 mV and +75 mV, remove the jumper.
Operating Instructions--DAS9100 Series 91A04A/91AE04A Service
To make the adjustment, you must first install all 91 AE04A modules in the mainframe, and connect them to the 91 A04A or 91 A04 master module. Then connect the digital multimeter (DM M) between the + 5 V supply of the master and the + 5 V supply of the 91 AE04A. The mainframe is then turned on and the difference between the two supplies is indicated by the DMM. The jumper on W148 is re-placed or removed depending on the reading from the DMM.
Perform the following steps to accomplish this adjustment:
~
Do not install or remove modules in a DAS mainframe while the mainframe power is on. Doing so may damage the module or the mainframe.
1 . Turn off power to the DAS mainframe.
2. Install all 91AE04A and 91AE04 modules in the mainframe. Position the modules thoughtfully, because the 91 AE04A modules must remain in these slots for the adjustment to remain valid.
3. Install the master 91 A04A or 91 A04 module in the mainframe. Make sure that all the modules meet the conditions given in Configuration Requirements earlier in this section.
4. Connect all cables between the modules as described in Module Installation earlier in this section.
5. Before turning on the mainframe, connect the negative lead of the DMM to pin 16 of U155 on the master module.
6. Connect the positive lead of the DMM to pin 16 of U155 on one of the 91AE04A modules.
7. Turn on the DAS mainframe and the DMM. Set the DMM to 200 mV full range, and record the voltage indicated by the DMM.
8. Turn off the mainframe and disconnect the DMM from the 91AE04A module just measured.
9. Lift the measured 91 AE04A module about 5 cm (2 inches) out of the mainframe. If the measured voltage was between -75 mV and +25 mY, place the jumper on W148. If the measured voltage was between + 25 mV and + 75 mV, remove the jumper from W148.
10. Press the adjusted 91 AE04A module back into the mainframe. The module is in place when it is flush with the tops of the other installed modules.
11. Repeat steps 6 through 10 for each 91 AE04A module in the system.
12. After all 91 AE04A modules have been adjusted, remove the DMM leads from the last 91 AE04A module and from the master module.
All 91 AE04A modules are now ready for use. The adjustment just completed will remain valid so long as the master module and all 91 AE04A modules remain in the same slots of the mainframe and no +5 V power supplies are replaced or moved.
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