User manual EUTECH INSTRUMENTS ALPHA PH 1000 PHORP CONTROLLERTRANSMITTER

[. . . ] Instruction Manual alpha-pH1000 pH and ORP Controller/Transmitter Technology Made Easy . . . 68X216801 rev 1. 1 07/02 Instruction Manual alpha-pH 1000 This manual serves to explain the use of the lpha-pH1000 series pH/ORP controller/transmitter. The manual functions in two ways, firstly as a step by step guide to help the user operate the instrument. This instruction manual is written to cover as many anticipated applications of the lpha-pH1000 pH/ORP controller/transmitter. If you have doubts in the use of the instrument, please do not hesitate to contact the nearest Eutech Instruments' Authorised Distributor. [. . . ] Using both SP1 and SP2, you can select lo/lo, lo/hi, hi/lo, or hi/hi set points. Scroll with the or key until the upper display shows Lo or Hi (for low or high set point) and the lower display shows SP1 (SP2). 3) Press the or key to select low (lo) or high (hi) set point for SP1 (SP2). 5) Proceed to 7. 3. 4 step 3, or return Measurement mode by pressing the and keys simultaneously (escape). 7. 3. 4 Selecting a hysteresis (dead band) value Hysteresis prevents rapid contact switching if your value is fluctuating near the set point. It does this by overshooting the set point value to a specified hysteresis value. You can set the hysteresis value from 0. 1 to 1. 0 pH, 10 to 100mV or 1 to 10%. Example: You have set your high set point at pH 9. 0 and your hysteresis limit value at pH 0. 5. If your measured value overshoots the high set point pH 9. 0, the controller's relay activates, which in turn activates an external devices such as a pump or valve. The actions of the external device will cause the solution's pH to drop. When the pH drops to 8. 5 pH, the relay and hence the pump will switch off. 20 Instruction Manual SETUP alpha-pH 1000 Follow directions in 7. 3. 1 to enter Control Relay mode. Scroll with the or key until the upper HOLD display shows the hysteresis (dead band) value and the lower display HYS shows "HYS". 3) Press the or keys to enter your hysteresis value for Set point 1 (Set point 2). 5) Proceed to 7. 3. 5 step 3, or return to Measurement mode by pressing the and keys simultaneously (escape). NOTE: Please refer to Appendix 3 for a graphical representation of the Hysteresis. 0. 50 pH 1) 2) 7. 3. 5 Setting an on-delay time lag You can set as time delay for each relay, which stops the relay from switching on the moment the set point is exceeded. This controller lets you set a 0 to 2000 second time delay before the relay activates. Scroll with the or key until the upper HOLD display shows "on delay" time and the lower display shows "On. d". On. d 3) Press the or key to enter on-delay time for Set point 1 (Set point 2). The controller will delay activation for the number of seconds (0 to 2000) you select. 5) Proceed to 7. 3. 6 step 3, or return to Measurement mode by pressing the and keys simultaneously (escape). 0 7. 3. 6 Setting an off-delay time lag You can set as time delay for each relay, which stops the relay from switching off the moment the value reached the set point and hysteresis. This controller lets you set a 0 to 2000 second time delay before your relay deactivates. Scroll with the or key until the upper HOLD display shows "off delay" time and the lower display shows "OF. d". [. . . ] These electrodes have integral 5m measuring cable terminating with a BNC connector. Please contact your authorised distributor or dealer for the prices of extension measuring cables and other accessories like tee joints, electrode assembly, and calibration solutions. 32 Instruction Manual alpha-pH 1000 11 GENERAL INFORMATION 11. 1 Warranty Eutech Instruments warrants this product to be free from significant deviations in material and workmanship for a period of one year from the date of purchase. If repair is necessary and has not been the result of abuse or misuse within the warranty period, please return by freight pre-paid and amendment will be made without any charge. will determine if product problem is due to deviations or customer abuse. [. . . ]