METEOROLOGICAL INSTRUMENTS INSTRUCTIONS METEOROLOGICAL TRANSLATOR MODEL 26800 R.M. YOUNG COMPANY 2801 AERO PARK DRIVE, TRAVERSE CITY, MICHIGAN 49686, USA TEL: (231) 946-3980 FAX: (231) 946-4772 WEB: www.youngusa.
1.2 OPERATING CONTROLS MODEL 26800 FRONT PANEL METEOROLOGICAL TRANSLATOR 1.0 INTRODUCTION The Young 26800 Meteorological Translator is a programmable digital display and data recorder for use with a wide range of meteorological sensors.
SERIAL COMM lists serial port type and baud rate settings. The system is now operating. In OPERATE MODE, the 26800 executes USER PROGRAM instructions which may collect sensor data, store records, process data, display results, produce outputs, or communicate via serial ports. When the 26800 is powered up, it automatically enters OPERATE MODE. COM1 may be set to operate as an RS-232 or RS-485 port. COM2 is always RS-485. Select EDIT to change. Use UP and DOWN ARROW keys to change value.
MENU. Navigate to the KEYPAD LOCK parameter and set it to UNLOCKED. Method two: Use RMYComm to reset the KEYPAD LOCKOUT parameter. SCREEN SCROLL sets parameters that automatically scroll the display through one of 8 screens. END SCREEN also sets the last screen to show in manual scroll mode. AUTO SCROLL: END SCREEN: PAUSE (SECONDS): ON or OFF Last screen to show, 1-8 Duration of pause, 01-99 UP/DOWN navigation keys change value. RIGHT/LEFT navigates characters in the field.
4.2 PROGRAM INSTRUCTIONS scrn= font= row= col= Instruction names are listed below. Each instruction is followed by a detailed description of its function and parameter settings. ALARM tests the value in a specified SLOC and activates one of DISPLAY NESW takes the angular wind direction value in the SOLID STATE SWITCH channels if the value meets conditions defined in the parameters. degrees from SLOC and displays it in terms of compass point descriptions: N, NNE, NE, ENE, E, etc.
IMPORTANT NOTE ABOUT FLAGS: FLAG 01 is a special flag that triggers result calculation for AVERAGE, MINIMUM, MAXIMUM and STANDARD DEVIATION instructions when they use the BLOCK method. The flag has no effect when the MOVING method is used. FLAG SET is used to set a flag ON or OFF. Use flags to signify the occurrence of some event and trigger a response (see IF FLAG). flag#= state= Flag number (01 to 16) Flag state (ON or OFF) IF LOC1 COMPARE VALUE compares the value in SLOC to a fixed value.
INPUT PRECIP (SIPHON) measures precipitation from a YOUNG siphon-type precipitation sensor using a VOLTAGE INPUT CHAN. Set voltage measurement TYPE as single-ended (SE) or differential (DIFF). Set precipitation measurement UNIT to MM or INCH. Apply multiplier and offset with MULT and OFFS parameters if needed. Result is stored at DLOC.
LOC1 = LOC2 OPER VALUE performs a numerical operation on the value in LOC2 using the number in VAL and stores the result in LOC1. POW raises the value in LOC2 to the power of VAL. MOD calculates modulo VAL. loc1= loc2= oper: val= Location where result is stored (001-256) Location (001-256) Math operator (+, -, *, /, POW, MOD) Numerical value RTD385 Calculates temperature of a 100-ohm 0.
BLOCK type progressively examines new samples and stores the current minimum in DLOC. When FLAG 1 is set, the minimum is stored in DLOC+1 and reset with the value in SLOC. IMPORTANT NOTE ABOUT SERIAL INSTRUCTIONS: All SERIAL BUFFER instructions (except SERIAL BUFFER OUT) add ACSII text to the serial output buffer. An internal buffer index increments with each new character added. This process continues until the 128-character buffer size limit is reached or a SERIAL BUFFER OUT instruction is executed.
STANDARD DEVIATION calculates the standard deviation of samples from SLOC and stores the result in DLOC. #SAMP defines the number of samples for MOVING type only. BLOCK type adds new values with each instruction iteration. When FLAG 1 is ON, the standard deviation is calculated. The process begins again when FLAG 1 is OFF. MOVING type keeps a list of every sample. After #SAMP samples have been collected, the first standard deviation is calculated.
SPECIFICATIONS - 26800 METEOROLOGICAL TRANSLATOR General Dimensions..................... 200 mm (7.8 in) x 144 mm (5.7 in) x 54 mm (2.1 in) Panel Cutout................... 194 mm (7.6 in) x 138 mm (5.4 in) Weight............................. 0.8 kg (1.8 lb) Operating Temperature... 0o C to 50o C Storage Temperature...... -30o C to 50o C Housing Classification....
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EXAMPLE USER PROGRAM This program takes wind speed and direction measurements from a Young 05103 Wind Monitor and Temperature/ RH measurements from a Young 41382V Temp/RH Sensor. The execution interval is set to 1 iteration per second. Instantaneous measurements are displayed on screen 1. Averages for all values and maximum wind speed are calculated and recorded once per minute.
