9
Chapter 2 Unpacking and Installing
Inspection
If the shipping carton is damaged, request that the carrier's agent be present when the unit is
unpacked. If the instrument appears damaged, the carrier's agent should authorize repairs before the
unit is returned to the factory. Even if the instrument appears undamaged, it may have suffered
internal damage in transit that may not be evident until the unit is operated or tested to verify
conformance with its specifications. If the unit fails to operate or fails to meet the performance
specifications of Chapter 3, notify the carrier's agent and the nearest Valhalla Sales Office. Retain
the shipping carton for the carrier's inspection. DO NOT return equipment to Valhalla Scientific or
any of its sales offices prior to obtaining authorization to do so.
Line Voltage / Fuse Selection
The only adjustments required before placing the unit in operation are to verify that the instrument
has been set for the proper local AC line voltage and to verify that the proper fuse for this voltage
has been installed as follows: 105 to 125 VAC = ¼ Amp Slo-blo; 210 to 250 VAC = 0.125 Amp
Slo-blo.
Note: These fuse values are doubled if any of the interfaces (IEEE, RS232, or Printer) are installed.
Refer to rear-panel markings.
On older models the AC line voltage is selected internally by the configuration of the jumpers on
pads 9 through 12. Pads 9-10 and 11-12 are jumpered together for 115VAC operation. Pads 9&12
only are jumpered for 230VAC operation.
On newer models the AC line voltage is selected via a sliding switch mounted on the rear panel of
the instrument. The appropriate fuse values remain the same.
Bench Use
The unit is supplied with all the hardware required for bench use and special instructions for use in
this manner are not necessary. The user should become familiar with Chapters 5, 6 and 7 before
attempting to operate the ohmmeter.
Rack Mounting
Optional brackets are available for mounting the ohmmeter in a standard 19" equipment rack.
These are listed in Chapter 4. The size of the unit and the location of its center of gravity dictate
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