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. Secondly, it serves as a handy reference guide. This instruction manual is written to cover as many anticipated applications of the lpha-pH1000 pH/ORP controller/transmitter. [. . . ] 3) Press the or key to enter your value for Set point 1 (Set point 2). Your controller will activate at the value you select. 4) Press the ENTER key to confirm your selection. 5) Proceed to 7. 3. 3 step 3, or return to Measurement mode by pressing the and keys simultaneously (escape). 7. 3. 3 Choosing High or Low set points Select a low set point to activate controller when the pH/ORP value undershoots the low set point; select a high set point to activate controller when the value overshoots the high set point. Using both SP1 and SP2, you can select lo/lo, lo/hi, hi/lo, or hi/hi set points. 1) Follow directions in 7. 3. 1 to enter Control Relay mode. 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). 4) Press the ENTER key to confirm your selection. 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). Your controller will activate at the value you select. 4) Press the ENTER key to confirm your selection. 5) Proceed to 7. 3. 5 step 3, or return to Measurement mode by pressing the and keys simultaneously (escape). [. . . ] Eutech Instruments' Customer Service Dept. will determine if product problem is due to deviations or customer abuse. Out of warranty products will be repaired on a charge basis. 11. 2 Packaging The instrument is packaged in a corrugated box with a warranty card, instruction manual and the following accessories: · 17-way and 5-way (right-angled) terminal block [1 unit each] · side threaded rod with catch [2 units] · receptacle cable lug [1 unit] · rubber gasket [1 unit] 11. 3 Return of Goods Authorisation must be obtained from Eutech Instruments' Customer Service Dept. to issue a RGA (Return of Goods Authorisation) number before returning items for any reason. [. . . ]