Page 88 VRC2000 Installation and Operations Manual
Technical or Setup Assistance
Telephone: 800.945.7730 (USA) or 801.975.7200 (worldwide) • Worldwide Web @ http://www.gentner.com
Question
My VRC2000 won’t automatically answer a ringing line. What can I do?
Answer
Try the following
• Set up the ring count for one ring.
• Verify that the circuit in use has a Class B ringer equivalency.
• RFI filter the telephone line.
Question
My VRC2000 won’t respond to DTMF commands. What can I do?
Answer
Verify that this is true with a variety of telephone instruments, and from
different telephone lines, then use the following list for suggestions.
• DTMF receive levels are distorted when issued after line connection on
some telephone exchanges. Typically, lowering the VRC2000’s receive
window cures this problem.
• Your telephone line in use may have RFI problems. Use a RFI filter.
Question
How do I figure an accurate calibration constant if my operating level is 5,200V
and my sample voltage is 4.5Vdc?
Answer
Set up the metering channel in use with a units identifier of KILO VOLTS,
then the calibration constant would be (5.2)/(4.5), which is 1.155.
Think of calibration constant in this manner:
“What number must I multiply my sample by to equal my actual
representation?”
Question
How long should I keep a status channel input low to assure VRC2000 detection?
Answer
At least one second.
Question
I need to monitor status conditions with a logic high greater than 5.2V. What can
I do?
Answer
Use a series diode to make the highs float which still allows the lows to
conduct current and pull the status channel low.
Question
What benefits does the Data Interface accessory provide?
Answer
The Data Interface can provide real-time readouts of all VRC2000 inputs for
display on a PC running Setup VRC2000 software (DOS) or VRC-Win
software (Windows®). It also allows users to program time-based automatic
logs for hard-copy sotrage or digital storage on your PC.
Frequent Questions
Continued
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