Valhalla Scientific 4314KV, Руководство по эксплуатации

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LOW BATTERY & POWER-UP CHECK
1. Remove the batteries and connect a power supply at 5.4 volts to the battery holder terminals,
observing polarity.
2. Connect a 10
Ω
resistor in the 20
Ω
range. Dial the power supply down to 4.8 volts.
The “Low Battery” indicator should start flashing red. Below 4.8V, “Low Battery” indicator should
be solid Red. If not, adjust R32 until the LED Turn RED below 4.8V.The display
must remain stable
and must not freeze up.
3. Increase the supply to 4.81 volts and note that the LED turns off. Return the supply to 5.4 volts.
4. Turn off the power switch and remove the load. Turn the power switch back on and reconnect
the load. The reading must return to the same value as before and not freeze up.
5. Remove power supply and install batteries.
Checking the Calibration Results
½ Scale and Linearity Check
Apply to each range resister values equal to 50% of range, 5% of range, 0.5% of range and 0.05% of
range.
All values should be within the tolerance specified in Chapter 3.
Zero Check
1. Apply a short between VHI and VLO.
2. Apply a short between VLO and ILO.
3. Check the display for 0 ± 3 digits
Battery Replacement Instructions
The rechargeable NiMH batteries used in the 4314KV/KVS are very durable and should provide years of
trouble-free operation. As with all batteries, replacement will eventually be necessary. Batteries may be
ordered from Valhalla Scientific as stock #05-10117, quantity: (4).
The process of battery replacement is described below:
Remove the 10 panel screws.
1. Undo hook and loop strap.
2. Remove the old batteries and replace. Observe polarity!
3. Secure the new batteries in place hook and loop strap.
4. Put the panel in place and tighten screws.