ECD T90 Instruction Manual
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Contents
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223.1.3 SELECTION ADJUSTMENT KEYSThe (4) Selection/Adjustment keys allow navigation and numerical adjustments to be made in the MENUs. Toenter the HOME Menu screen press any of the Selection/Adjustment keys twice within one second. Thevarious Menu choices and adjustment tools are displayed above the buttons once inside the MENU.3.1.4 ALPHA NUMERIC ENTRYThe LABEL and PASSWORD (Caps and Numbers only) Menus allow alphanumeric entry. Entry is accomplished byscrolling through the alphanumeric list with the ▲ (forward) and ▼ (backwards) arrows to the character ofchoice and then moving to the NEXT digit. Pressing and holding the ▲ or ▼ keys will initiate two speed autoscrolling. The character set is sequentially listed below. The first character in the set is an empty space.! ” # $ % & ‘ ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9 : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ ¥ ] ^ _‘ a b c d e f g h I j k l m n o p q r s t u v w x y z { | } → ←3.2 MENU STRUCTUREDouble tap any Selection/Adjustment key to enter the HOME Menu Screen. Five menu choices will appear, CAL,CONFIG, INFO, SIM and HOLD. Each of the Menus is detailed below.3.2.1 HOLD (OUTPUT HOLD)Pressing the HOLD Key activates the HOLD function, HOLD is ON, displayed. Freezes the 4-20 mA output at the last value prior to activation Freezes optional Alarm Relays in the current state While in the HOLD mode the % Output display toggles between the lastvalue and HOLDPressing HOLD again turns the hold function off, Hold is OFF, displayed. The HOLD function remains ON until it isturned OFF. (See Time Out in CONFIG>XMTR>OUTPUT>HOLD)3.2.2 CAL (CALIBRATION MENU)Four options are available, AUTO, STAND, MANUAL and TEMP. On dual channel instruments choose Sensor 1 orSensor 2 when prompted.The first screen asks, “Is this a New Sensor, YES / NO”. If YES the calibration historyfrom the previous sensor is cleared from memory and a new register is started, if NOthen the calibration is written to the memory stack, (3) sets of data are stored. AUTO is a two point calibration. The calibration proceeds in two steps, AutoCal 1 is an offset calibrationand AutoCal 2 is a slope calibration. Auto Cal provides automatic solution recognition of the calibrationsolutions used for each measurement in accordance with the following list:1. pH Calibration Buffers (US Standard), pH 4.01, pH 7.00 and pH 10.00 (see Appendix A)2. ORP Calibration Solutions: Quinhydrone saturated: pH 4.01= +89 mV, pH 7.00= +266 mV3. pIon Calibration Solutions: 1.00, 10.00, 100.0 ppb, ppm, ppt(thousand)4. Dissolved Oxygen: Zero ppm (Sodium sulfite, Na2SO3 in water), Airsaturated water, 8.25 ppm |
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