TRUMETER 7922 Preset counter with 2 relay outputs
247,67 € plus VAT.
0 Stück auf Lager (Lieferzeit ca. 20 Werktage)
Description
TRUMETER 7922 Preset counter with 2 relay outputs
This versatile counter with prescaler can be configured for square wave or unidirectional inputs, single or double prescaling with batch prescaling. Reset can be automatic, manual or electronic with a sink (NPN) or source (PNP) input. The display is a backlit Supertwist LCD with high readability, making it readable from any angle. The count value is shown in the main display, the preset value (or batch preset value) in the secondary display.
Programming, zero setting and preselection can be carried out from the front panel. When powered by the mains, there is a 12 V DC output for operating a sensor. The P1 or P2 preset value (or batch preset) can be set on the secondary display using the buttons below the individual digits. The red reset button resets the set value in the display to 0 or P1 (depending on the programming).
Features
- Supply voltage 85–265 V AC or 10–26 V DC
- Auxiliary output 12 V DC
- Prefix values 1-999999
- adjustable to a maximum of 3 decimal places
- Scaling factor multiplication 0.00001–9.99999, division 1–99999
- Counting inputs 10-30 V DC, NPN, PNP
- Counting frequency max. 10 kHz
- Manual, external or automatic reset
- 2 output relays 5 A as normally closed or normally open contacts
- EEPROM data storage
- Backlight
- Dimensions (WxHxD): 48 x 48 x 93 mm
- CE, UL and cUL tested
FAQ
7922 and 7932 use an EEPROM to back up the programming and count values. This is done by monitoring the meter's internal power supply.
If the external supply voltage is switched off, the internal voltage drops accordingly. This is registered by a special circuit and the backup mechanisms are activated so that all relevant data is saved in the non-volatile memory. In addition, a so-called „checksum“ is generated, which is also stored in the memory.
When the external power is switched back on, the processor reads the data from the memory, generates a checksum and compares it with the stored checksum. If the new checksum differs from the previously stored one, the processor interprets this as an error and assumes that there is a data error. This results in the message „ERR CH“, which signals a data error.
This error can be caused by a defect in the processor, in the EEPROM, or by external voltage spikes. If the error is caused by external voltage spikes, it can be avoided by using suitable filters. A “power-up reset” is required to eliminate this error.
- Switch off the power supply.
- Press and hold the PROG button and digit 5 button simultaneously.
- Switch the power supply back on while holding down the buttons. Hold the buttons down for approx. 15 seconds until 7922/7932 appears on the display.
- The EEPROM memory has now been reset to its default values and the meter must be reprogrammed.
Additional information
| Supply voltage | 230 V AC |
|---|---|
| Switch output | Relay |