Accessories
Electronic Display Unit
Overview
Application
The EDU 32 FP accessory is a microcomputer-controlled counter and display apparatus. It is designed to be used in conjunction with RITTER Gas Meters, to count and display the absolute volume and flow-rate of Gases flowing through the RITTER meter. It consists of a unit in a separate (desk top) casing with a two-line Plain-Text-LCD-Display, and can be used with all types of RITTER Gas Meters. The following individual alterations and functions can be programmed via the Control Buttons:
- Gas Meter type being used
- Individual measurement range (min./max. flow rates) for custom-built Gas Meters
- Upper and lower limiting values for Flow Rate
- Pulse Generator in use: Standard (200 Pulses per revolution of the measurement drum), Ex-Proof (50 Pulses/Revolution) or custom-built Models (customer-preferred number of pulses under 200 or 50 respectively)
- Language German/English in the Display
- Analog-Output: Output Current or Output Voltage
- Contrast adjustment of the Display
Standard Adjustment Specifications
If the EDU 32 FP is ordered together with a Gas Meter, or ordered separately but with notification included of the type of Gas Meter with which it will be used, it will be delivered to the Customer already programmed for that Meter. If ordered separately with no such notification, it will be programmed to the following standard specifications:
Gas Meter Type: | TG 05 |
Sensor Type: | PG 3.1 |
Language: | English |
Output Signal: | 4 - 20 mA |
'Programming' explains how the Display Unit can be programmed for other adjustments, should these be required.
Changing the fuse
Before changing the fuse, disconnect the mains supply cable from the unit!
The EDU contains a semi time-lag fuse of 0.1 ampere. The fuse is in a fuse drawer located on the rear panel in the black “rectangle” directly under the mains supply socket.
After having disconnected the unit from the mains supply, the fuse drawer can be pulled out. This can be done by inserting the tip of a little screwdriver into the slit at the top edge of the drawer , squeezing out the drawer with gentle pressure.
The fuse drawer contains two fuses, an “active” one and an additional one as a replacement-fuse. The “active” fuse which is held by a friction spring, is visible when the drawer is removed. This “active” fuse can be taken out of the friction spring by pushing the spring sideways. The replacement fuse is positioned inside of a storage bin which is located directly in front of the “active” fuse. It can be pushed out of the bin with the screwdriver.
Subject to alterations