Drum-type Gasmeters TG-Series (Wet-Type)

Operation Instructions – Measurement (Chapter 3)

3.1. Initial set-up

• Type TG 01
  In order to keep the mechanical resistance as low as possible, the TG01 is equipped as Standard with a Pulse Generator instead of with a mechanical counter. There is therefore no display of measured volume at the Gas Meter. Instead, the TG01 is equipped as standard with a pulse generator, from which the signals (= pulses) can be transferred either direct to a Electronic Display Unit EDU 32 FP (recommended) or to a user-specific data logging system which can further process the voltage signals. The EDU 32 FP displays volume and calculates flow rate.
  In order for the pulses to be transmitted, the Output socket of the Pulse Generator (located at the 8 o'clock position on side of the Pulse Generator casing) must be connected via the accompanying cable (2 x 5-pin DIN-plugs) to the Electronic Display Unit EDU 32 FP. The EDU 32 FP must be turned on and programmed for use with the Gas Meter type TG 01 (please see the EDU 32 FP Operating Instructions, chapter 6). The Gas Meter is then ready for Operation.
• Type TG 05 – TG 50
  For ease of reading at the end of measurement, the large Needle of the dial plate can be set manually to zero prior to each measurement. In the case of units with a totalizing roller type counter (standard version), the counter reading must be noted. On the version with a resettable roller-type counter (optional), the counter can be set to zero with the reset button. The Needles can be set manually to zero on units with a totalizing Needle-type counter (optional). The Gas Meter is then ready for Operation.

3.2. Check: Liquid level

Prior to each subsequent measurement, the fluid level must again be checked in accordance with paragraphs 2.3 and 2.4.

3.3. Check: Performance data

When taking measurements, pay attention to the performance data of the respective gas meter (refer to the attached data sheet). The maximum pressure load is 50 mbar for the standard drum-type gas meters made out of plastic and 500 mbar with meters with a stainless steel casing!

3.4. Measurements with oxygen

The mixture of some gases with oxygen may cause an explosion. Therefore, before and after measuring with oxygen, ensure that no gas used in the previous measurement is still within the measuring drum or the inside of the housing. To exclude this danger of explosion, the gas meter has to be purged with an inert gas (e.g. nitrogen or any noble gas). The purging can be performed by operating the gas meter with an inert gas for at least five revolutions of the measuring drum (= five revolutions of the large Needle on the dial plate).

Subject to alterations